Carbon pack for continuous-form stationery



Dec. 6, 1955 L. K. FL EISCHMANN CARBON PACK FOR CONTINUOUS-FORM STATIONERY Filed June 5, 1955 United States Patent Ofiice CARBON PACK FOR CONTINUOUS-FORM STATIONERY Lester K. Fleischmann, Chicago, Ill.

Application June. 5, 1953, Serial No. 359,800

4 Claims. (Cl. 282-1) This invention relates to carbon packs for continuousform stationery in a writing machine, and more particularly to an improved manner of attaching the carbon sheets to a leader sheet and the carbon pack to an anchoring structure.

The present invention is an improvement on the device shown in my patent, No. 2,233,204, issued February 25, 1941. The carbon pack shown'in my patent has been in use for many years, and the present invention is intended for the same use and incorporates certain features which are improvements thereover.

It has been found in the past that the carbon pack, particularly the sheets along the lines to which they are attached to the leader sheet, present a rather bulky structure which it is desirable to avoid. This has been done away with in the present structure by cutting away a major portion of the line along which the carbon sheets are attached to the leader sheet so that a pair of spaced tabs, one on each side of the leader sheet, sufiice to hold the carbon sheets in the carbon pack. In addition, it has been found that the alignment of the carbon pack with the stationery strips with which it is used is sometimes hard to maintain. Therefore, the present invention also contemplates a new and novel means of attaching the carbon pack to an anchoring structure such as a blade in a writing machine. The attaching structure also provides means by which the carbon pack may be attached securely to the blade by means of a paper clip or pressure sensitive tape.

The invention is illustrated in a preferred embodiment in the accompanying drawings in which:

Figure 1 is a perspective view of a carbon pack made in accordance with the principles of the present invention and ready for insertion in a writing machine;

Figure 2 is a sectional view through the center of the pack taken in a longitudinal direction as indicated by line 2-2 in Figure 1;

Figure 3 is a perspective view of the carbon pack substantially as shown in Figure 1 with the cover sheet cut away to show the interior structure and the means of attaching the carbon pack to an anchoring blade shown in dotted lines; and

Figure 4 is a fragmentary sectional view through the carbon pack at the line of stitching securing the carbon sheets to the leader sheet, taken along line 4-4 in Figure 1.

In the embodiment illustrated in the drawings, it should be understood that the thickness of the sheets, including carbon, leader and cover, is grossly exaggerated in order to show the structure. In actual use, the carbon pack lays quite flat and does not provide any particular bulkiness between the stationery strips with which it is used.

As illustrated in the drawings, a leader sheet 5 is secured as by a line of stitching 6 to cover sheet 7; each of these sheets has a flap extending rearwardly from the line of stitching securing them together. The flap 8 on the leader sheet 5 is essentially longer than the flap 9 on the cover sheet 7. By this structure, a blade 10, such as is illustrated by dotted lines in Figure 3, may be placed between the flaps so that the inner or forward edge of the line of stitching 6 and the fold line 12 in the flap 8.

A central opening 14 is provided in the flap 8 so that a pressure sensitive tape can be placed across the flaps 8 and 9 and the blade 10 to securely hold the pack to the blade 10.

The leader sheet 5 extends forwardly to an opposite end 15. Over this leader sheet, the cover sheet 7 extends to a similar end 16, illustrated in Figures 3 and 4. A number of carbon sheets 17, here shown as two in number are secured to the leading edges of the leader sheet 5.

The carbon sheets 17 are positioned with their carbonized face extending upwardly toward the cover sheet 7 and are secured by a line of stitching 18 which extends across the leader sheet 5 and, as illustrated in the drawings, has two portions, one at either side of the leader sheet. This structure is made by cutting out a portion as indicated at 20 centrally of the leader sheet and the attached carbon sheets. This may be done after the carbon sheets are attached to the leader sheet 5 so that perfect alignment will be retained. When it is desired to tear off a carbon sheet 17, it is obvious that only a short tear along each of the portions of stitching line 18 is required. Such action will leave a small tab 21 on the forward edge of each portion of the stitching 18. This short tear line, as compared with what has been used previously extending across the sheet, makes the tearing off of a carbon sheet much easier.

Until pulled forward for use, the carbon sheets are folded rearwardly upon themselves about a fold line 22 so that the sheet will repose entirely within the pack between the leader sheet and the cover sheet. When it is desired to bring a carbon sheet forward for use, it is merely necessary to pull the carbon sheet forwardly out from between the cover sheet and leader sheet. This exposes the carbon sheet with the carbonizd surface on the correct side. If desired, each carbon sheet may be provided with a central cut out portion 23 so that it may be easily stripped from individual sheets of a continuousform stationery strip. Since the fold line at the stitching 18 is shorter than is normally used with the full line of stitching across the leader sheet, it is obvious that the carbon sheets will lay flatter as they are pulled forwardly from the carbon pack into usable position. It has been found that substantially one-half of the line of stitching 18 may be removed without allowing the carbon sheets to be torn accidentally from the carbon pack.

It will be noted that the leading corners 24 and 25 of the carbon pack are trimmed off so that the pack may be used with manifold stationery if desired. With the present invention, the carbon pack may be securely supported on an anchoring structure such as the blade 10 and will maintain its alignment since the flaps 8 and 9 securely hold the carbon pack against the bar. In addition, the sheets may be easily torn from the carbon pack as they become too used for further use.

The foregoing detailed description is given for clearness of understanding only and no unnecessary limitations should be understood therefrom as modifications will be obvious to those skilled in the art.

I claim:

1. A carbon pack, adapted for use between a pair of continuous-form stationery strips, comprising: a folded leader sheet having a cover portion and adapted to be anchored between forwardly advancing stationery strips;

Patented Dec. 6, 1955 a plurality of superposed carbon sheets, with their carnnized faces. upward,havingwatsoneend a. pairot spaced attaching tabs leaving a wide .open notch between them, said tabs being stitched to the front end portion of said leader. sheet, whereby the carbon sheets when in forwardly I extended position are held :by. the tabs.

2., A.carbon.p.ack as specifiedzrimclaim 1, in whichrthe notchbetween the tabs=isnotzover twice the width of the tabs.

3; A carbontpack asfipefllfifidifliClaim' 1, in which the leader sheet-and cover portion-are provided with a corresponding notch between the secured tabs.

4. A carbon pack as specified in claim 1, in which the l der sheet n er sh ar s itched. toge h r o as.

to provide flap portions extending rearwardly of the stitching, said line of stitching being spaced from the fold in the flap portion a distance to receive a mounting plate.

References Cited in the file of this patent UNITED STATES PATENTS 

